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Give reasons : (i) The stability of +3 oxidation state of 13 group elements decreases down the group. (ii) Boron is used as control rods in nuclear reactors. (iii) Graphite is soft and slippery. |
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Answer» (i) The stability of +3 oxidation state of group 13 elements decreases down the group due to the inert pair effect on ns2 electrons. This is because of the poor shielding effect of electron in ‘d’ and ‘f’ orbitals. (ii) Because it absorbs neutrons (iii) Due to the weak van der waal’s force of attraction between the layers of hexagonal rings. |
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